Form handler parameters which need to be supplied should be added to the params argument. In a JSP page these parameters would be the input tags in a JSP form. The following example calls the handleCreate() method on a form handler. The inputs to the form handler are a first and last name.
Map<String,String> params = new HashMap<String,String>();
params.put("firstName", "Andy");
params.put("lastName", "Jones");
RestResult result = RestComponentHelper.executeMethod("/some/FormHandler",
"create", null, params, session);